Joe Odom shows up at Khloe's book signing seeking to reconnect with his son.

*During Sunday’s season premiere of “Khloe and Lamar,” E!’s latest Kardashian spinoff starring Khloe and her husband Lamar Odom, the Los Angeles Lakers star stunned his wife by revealing that his estranged father is a heroin addict, telling her that he “witnessed things that a 10-year-old definitely wasn’t supposed to see.”

During the episode, Joe Odom called his son’s cell phone. Khloe encouraged her husband to take the call but Lamar revealed, “My father’s a heroin addict. I had my mother around until I was 12-years-old when she passed away and after that my father wasn’t around. I witnessed things that a 10-year-old definitely wasn’t supposed to see.”

Lamar’s mother died of colon cancer and he was raised by his grandmother Mildred.

Someone whispers Joe Odom's unexpected arrival to Khloe.

During last night’s episode, Joe Odom also showed up at one of Khloe’s book signings and revealed that he wanted to reconnect with his son. Kardashian approached Lamar with the idea, but the NBA star wasn’t trying to hear it.

See footage of the Joe Odom drama in the “Khloe and Lamar” season promo below.